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Mirrors > Home > MPE Home > Th. List > tpex | Structured version Visualization version GIF version |
Description: An unordered triple of classes exists. (Contributed by NM, 10-Apr-1994.) |
Ref | Expression |
---|---|
tpex | ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-tp 4575 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
2 | prex 5336 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
3 | snex 5335 | . . 3 ⊢ {𝐶} ∈ V | |
4 | 2, 3 | unex 7472 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
5 | 1, 4 | eqeltri 2912 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2113 Vcvv 3497 ∪ cun 3937 {csn 4570 {cpr 4572 {ctp 4574 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-sep 5206 ax-nul 5213 ax-pr 5333 ax-un 7464 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-v 3499 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-nul 4295 df-sn 4571 df-pr 4573 df-tp 4575 df-uni 4842 |
This theorem is referenced by: fr3nr 7497 en3lp 9080 prdsval 16731 imasval 16787 fnfuc 17218 fucval 17231 setcval 17340 catcval 17359 estrcval 17377 estrreslem1 17390 estrres 17392 fnxpc 17429 xpcval 17430 efmnd 18038 psrval 20145 xrsex 20563 om1val 23637 signswbase 31828 signswplusg 31829 ldualset 36265 erngset 37940 erngset-rN 37948 dvaset 38145 dvhset 38221 hlhilset 39074 rabren3dioph 39418 mendval 39789 clsk1indlem4 40400 clsk1indlem1 40401 rngcvalALTV 44239 ringcvalALTV 44285 lmod1zrnlvec 44556 |
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